Mini Satellite Attitude Determination and Control System
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Reaction Sphere


      Controlled by a patented magnetic field design, a spherical motor is capable of spinning in X, Y, and Z axes. Moreover, bias-currents are applied to each phase of the motor, this enables the motor to combine 3-axis magnetorquers into this device as well.


Application: Attitude Control

      Every satellite in orbit requires precise orientation control along the X, Y, and Z axes. This is the so-called attitude control, which is essential for optical sensing satellites and broad-band communication satellites. To achieve this, we use a tactical grade gyroscope and fine sun sensor as the attitude determination sub-system; the spherical motor functions as the attitude actuator. 


  • Weight: < 400g
  • Dynamic Balance: < G 0.4
  • Max. Power Consumption: 1 W
  • Power Consumption when no torque output: 0.2 W
  • Pointing Accuracy: 0.2 degrees when the sun is capturable; 1 degree when the sun is not capturable
  • Max. Momentum: 10 mNms
  • Max. Torque: 1mNm
  • Interface: I2C, UART
  • Lead Time: 4 weeks
  • Lifetime: 3+ years in LEO


    There are two obstacles for commercial players to enter the space industry: Rocket Launching Cost and Satellite Building Costs. While Satellite minimization is the key to tackle the second issue, Attitude control devices, among all sub-systems, are among those devices that cannot be shrunk due to physical limitations. Tensor Tech developed a groundbreaking spherical motor technology by replacing three motors with only one. Our device’s weight, size, and power consumption are reduced by 2/3 compared with traditional systems. Our invention also might enable the space industry for wider commercial applications by allowing a satellite mission with lower costs and capabilities of carrying more payloads. 


Thomas Yen

Co-founder and CEO
  • Business Development & Hardware

  • Entrepreneur in Residence, Infinio Capital​

Sam Lee

Co-founder and CTO
  • Motor Control & Firmware

  • Electrical Engineering, National Taiwan University


Austin Chang​

Co-founder and COO
  • Finance & Software

  • Computer Science, National Taiwan University of Science and Technology


Luke Hou

Co-founder and CPO
  • Mechanisms & Manufacturing

  • Electrical Engineering, National Sun Yat-sen University

Min-Fu, Hsieh

Technology Advisor
  • Professor, Department of Electrical Engineering, National Cheng-Kung University

  • Mechanical Engineering Ph.D., University of Liverpool​

K.S. Pua

  • Control Engineering M.S., National Chiao-Tung University

  • Chairman & CEO, Phison​ Electronics Corp.

Eric Lin

Business Advisor
  • Managing Partner, Infinio Capital

  • Founder & COO, Symbiosis Creative

Alicia Hsu

Legal Counsel
  • Columbia University, School of Law, USA (LL.M.)

  • Former General Counsel of Taiwania Capital

  • Lawyer, licensed in Taiwan and New York State, USA


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